A further 25,000 plants proposed to be planted before the end of the project 30 June this year. These natives stabilise riverbanks and act as filters to trap water contaminants such as chemicals, nutrients, sediment, and bacteria before they enter the waterway.
3.5 km is currently in progress, with an additional 3 km proposed for completion by the end of the project. This fencing will help keep stock out of waterways and wetlands, reducing the amount of contaminants that enter the river.
More work will be done in the coming months to replace three culverts in the lower catchment to improve fish passage to the upper catchment.
Sediment traps will be monitored and emptied out if necessary. The amount of sediment collected will be estimated. These sediment traps have associated planting on the surrounding slopes to stabilise them over time. Native plants have also been established around and between the traps to capture more sediment and create native habitat.
The Patterson Road ford before initial improvements to fish passage
The Patterson Road ford after initial improvements to fish passage
Aukaha’s planting team has been carrying out the majority of the planting, with landowners also rolling up their sleeves and planting a large number of natives on their land. There have also been several community and school planting days held to give locals and those with an environmental passion an opportunity to assist with plantings of natives around waterways in the catchment.
Through these efforts, we have been able to successfully plant nearly half of the proposed native plants so far.
The plants have been grown and supplied by Kāti Huirapa Rūnaka ki Puketeraki’s community nursery and Ribbonwood Nurseries in Dunedin and include such species as coprosma spp., carex spp., harakeke/flax and tī kōuka/cabbage tree.
Toitū Te Hakapupu project is required to complete 20 km fencing of water ways as part of its KPIs agreed to in the funding deed.
To estimate how much of the main stems of the river was available to fence, the ORC project team developed a map showing the length of the main stem of the river.
Waterway (land use)
as per the map above
Hakapupu / Pleasant River (forestry) | 10 km |
Hakapupu / Pleasant River (pastoral) | 12 km |
Owhakaoho / Trotters Creek (forestry) | 14 km |
Owhakaoho / Trotters Creek (pastoral) | 6 km |
Tumai (pastoral) | 2 km |
Watkin Creek (forestry) | 5 km |
Watkin Creek (pastoral) | 7 km |
This data tells us the following:
Total riverbanks available along the main stem (see map) of the primary Hakapupu and its two main tributaries, Owhakaoho (Trotter), Watkin and Tumai.
Length of river through pastoral farming where fencing to exclude stock is required.
River |
Length (km) |
Hakapupu |
12 |
Owhakaoho |
6 |
Watkin |
7 |
Tumai |
2 |
TOTAL |
27 km |
This means there is a total of 54 km of possible riverbanks to fence off and exclude stock. The project team then calculated the amount of river that will be fenced by the project as of August 2024.
Fence status |
Length (km) |
Completed |
10.5 |
In progress |
12.5 |
Proposed |
12.5 |
To be completed by project |
35.5 |
The project team has engaged with nearly all parts of the rivers under pastoral farming to install fencing. Much of the remaining river is already fenced.
River |
Length (km) |
Hakapupu |
22 |
Owhakaoho |
20 |
Watkin |
12 |
Tumai |
2 |
TOTAL |
56 km |